CNN Anderson Cooper 360 August 14, 2013 08:54:00
About this sinkhole, it's easy to get inside. called the devil's den, it's open to tourists for viewing and diving. and dive instructioner prince johnson takes me under for a look. i find that this seemingly placid pool of water is anything but. >> the water has gone down considerably because of the aquifer, but it's also risen when we've had hurricanes and tropical storms, it's risen another 45 feet. >> reporter: 45 feet? >> 45 feet. >> reporter: down here it's easy to see how fluctuating ground water has wreaked havoc. i pass by limestone boulders as big as cars sitting on the bottom. and th...
Source: archive.org